Skull pin with enhanced shear resistance

Surgery – Instruments – Orthopedic instrumentation

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

411386, 606 76, A61B 1756, F16B 2500

Patent

active

051221322

ABSTRACT:
A skull pin provides greater resistance to shear forces so that it may be more readily made of titanium, ceramic or gem stone, yet still prevents undue penetration, and can be tightened if wear or erosion of the skull results from cyclic loading. The pin is used with a halo or cervical traction ring, and has a main, externally threaded, circular cylindrical body, and a skull engaging portion. The skull engaging portions is formed by first and second concentric, in-line cylinders terminating in conical sections, the first conical section terminating in the second cylinder (which resists shear forces much better than conventional skull pins), and the second conical section terminating in a pointed tip. The first cylinder has a diameter of about 0.18 inches, the first conical section has a length of about 0.09 inches and approximately a 60.degree. taper angle, the second cylinder has a length of about 0.03 inches and a diameter of about 0.07 inches, and the second conical section has approximately a 60.degree. taper angle.

REFERENCES:
patent: 2532296 (1950-12-01), Giesen
patent: 3053256 (1962-09-01), Cooper
patent: 3223087 (1965-12-01), Vladyka
patent: 3790507 (1974-02-01), Hodosh
patent: 4463753 (1984-08-01), Gustilo
patent: 4475550 (1984-10-01), Bremer et al.
patent: 4612930 (1986-09-01), Bremer
patent: 4706665 (1987-11-01), Gouda
patent: 4793335 (1988-12-01), Frey
patent: 4838264 (1989-06-01), Bremer
patent: 5030220 (1991-07-01), Howland
S. Garfin et al, "Structural Behavior of the Halo Orthosis Pin-Bone Interface: Biomechanical Evaluation of Standard and Newly Designed Stainless Steel Halo Fixation Pins", SPINE, vol. 11, No. 10, 1986, pp. 977-981.
Bremer Medical Brochures "Halo Accessories", Adjustable Ring Traction Sets, and Halo Crown.RTM.; 1987, 1990.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Skull pin with enhanced shear resistance does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Skull pin with enhanced shear resistance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Skull pin with enhanced shear resistance will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1750862

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.